<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>ES8- 对象方法扩展</title>
</head>

<body>
  <script>
    // 声明对象
    const school = {
      name: "尚硅谷",
      cities: ['北京', '上海', '深圳'],
      xueke: ['前端', 'Java', '大数据', '运维']
    };

    // 获取对象所有的键
    // console.log(Object.keys(school));
    // 获取对象所有的值
    // console.log(Object.values(school));

    // entries
    // console.log(Object.entries(school)); // 键值对

    // 创建Map
    // const m = new Map(Object.entries(school));
    // console.log(m.get('name'))
    // console.log(m.get('cities'))


    // 对象属性的描述对象
    console.log(Object.getOwnPropertyDescriptor(school))
    const obj = Object.create(null, {
      name: {
        // 设置值
        value: '尚硅谷',
        // 属性特性
        writable: true,
        configurable: true,
        enumerable: true
      }
    })

  </script>
</body>

</html>